This has been has been thoroughly debunked so many times I thought I may as well gather several in place:

1. The U.S. government has trashed the study. The US National Renewable Energy Laboratory has weighed in with a white paper that notes that the Spanish study used a questionable methodology, lacks transparency and supporting data, and ignored several pieces of key information. In NREL's words: "The recent report from King Juan Carlos University deviates from the traditional research methodologies used to estimate jobs impacts ...The primary conclusion made by the authors - policy support of renewable energy results in net jobs losses - is not supported by their work."

2. The Spanish Government has trashed the study. Teresa Ribera Rodriguez, Spain's Secretary of State for Climate and Minister of the Environment for Rural and Marine Affairs, wrote a detailed letter explaining the factual and methodological flaws in the analysis. Pretty much along the lines of what NREL noticed, so I won't repeat them.

3. The study's conclusions are contradicted by the Spanish government's job data on renewable energy. As the American Wind Energy Association points out: "The Spanish Ministry of Labor has found that, contrary to the Spanish study, renewable energy industries have created 175,000 jobs and the European Commission found that aggressive renewable policy would create a net increase of over 400,000 in the European Union by 2020, giving a 'significant boost to the economy and the number of jobs in the EU.'"

8. Studies show that investing in clean energy jobs would be a big plus for the U.S.Through direct investment in clean energy and the leveraging of private investment by putting a price on carbon, ACES will fuel a new era in clean energy development in the U.S., along with the businesses and jobs to support it. Combined with the American Reinvestment and Recovery Act (ARRA), ACES will help spur $150 billion in clean energy investments, which will create 1.7 million good-paying jobs throughout the United States.

9. If one applies Calzada's own methodology to the University where he works, one could justify shutting it down. In an apt illustration of the absurdity of Calzada's approach, Grist's Craig Morris observed that

"The last annual budget of the University of Rey Juan Carlos, where Álvarez teaches, was 22,889,932.93 euros. With a staff of around 2,000 people, that comes to some 416,180 euros per job, according to his own method. In other words, Prof. Álvarez's calculation would seem to suggest that shutting down his university would create 1.5 jobs (416,000 euros divided by 259,000 euros per job in the general Spanish economy) for each job lost. I wonder if Mr. Álvarez would prefer, to take the example he gave, flipping burgers 60 hours a week to his cushy job that allows him to upload draft papers to the web."

Generally I admire people who don't give up. But I admire them a lot more when the facts are on their side.